Java 在方法内部修改数组参数的元素

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import java.util.Arrays;/*来自 N o  w  J a v a . c o m - 时  代  Java*/

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public class Main {

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  public static void main(String[] args) {

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    int[] origNum = {1, 2, 3};

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    String[] origNames = {"Mike", "John"};

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    System.out.println("Before method call, origNum:" + Arrays.toString(origNum));

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    System.out.println("Before method call, origNames:" + Arrays.toString(origNames));

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    // Call methods passing the arrays

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    tryElementChange(origNum);

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    tryElementChange(origNames);

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    System.out.println("After method call, origNum:" + Arrays.toString(origNum));

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    System.out.println("After method call, origNames:" + Arrays.toString(origNames));

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  }

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  public static void tryElementChange(int[] num) {

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    // If array has at least one element, store 1116 in its first element

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    if (num != null && num.length > 0) {

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